Electro-medical apparatus



(No Model.)

J. S. MUIR.

ELECTRO MPDPGAL APPARATUS.

No. 386,754. Patented July 2A, 1888.

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Qiliairien STATES ilarrignr JOHN S. MUIB, OF SAN FRANCISCO, GALIFGRNIA.

LECTRO-MEDCAL PFARATUS.

SPECEFICATION forming pari: of Letters Patent No. 386,754, dated July 2%, l888.

Application filed January Q3, 18528. Serial No. .GLGSZ.

To all 1072.072 it may concern,.-

Be it known that I, Jenn S. Norma citizen ofthe United States, residing in the city and county ol' San Francisco, and State of Ualil'ornia, have invented certain new and useful lmprovemenls in Electro-Medical Apparatus; and do hereby declare that the Yfollowing is a full,clear, and exact description ol' my said invention, reference being had to the drawings that accompany and form part of this specilication.

My invention relates to improvements in electro-medical apparatus ot' the hind that is embraced in the Letters Patent ofthe United States which were granted and issued to me on the 13th day ol' Deeember,l887, l\l0.374,747.

These improvements consist in making the handle and the frame ofthe rolling electrode separable for convenience of packing in small compass; also, in placing the battery and in duction-coil entirely Within the handle and having the rolling electrode and the circuit breaker mounted on a separate frame or part that can be detached from the handle; also, in an improved construction of shunt for varying the intensity of the current.

Referring io the accompanying drawings, Figure l is a view of the instrument in longitudinal section. Fig. 2 is a View of the parts of the instrument separated from oneanother, the battery being drawn out ot' the handle. Fig. 3 is a View of the circuitinterruptcr and. rolling electrode in section, and of the interrupter-Wheel. Fig. 4 is a view' ol` the electrode removed from its frame. Fig. shows the terminals of thc primary coil and of the shunt at the handle end that sets into the socket of the frame. Fig. 6 illustrates another construction of interrupter.

Similar letters of reference indicate like parts in all the figures.

In the present construction of niyinstrunient I place the battery insidethe handle and at the rear end and bring the terminals of the induction-coil out to the opposite side, where the rolling electrode is attached. The traine is detachable l'rom the handle, and is locked in position by means ol' a pin on the inside of its collar and a locliingslot on the end of the handle.

A is the handle, B the frame, and B the (No model.)

collar ltting over the end of the handle. G is the pin inside the collar, and G" G2 are the locking-slots l'or the pin.

XVhen the parts are put together,ihe pin entering the slot G comes in line with the crossslot G as the collar is pressed down against the shoulder Gi" on the handle, and by turning the handle in lilie collar the pin sets into the cross-slot and locks the parts together. rihe terminals of the coil are brought into electrical connect-ion with theframe Basilic parts are thus joined together.

C is the primary coil7 and C is the point of connection to one pole ofthe battery hi.

X is one terminal of the primary coil, and Y is t-he other terminal, which is carried from the pole of the battery M through the handle.

The conductor C may be the core of the primary coil. Its end forms the terminal X and is carried through the insulating-block D to take against the contact spring l, that is attached to the frame at li. The other terminal, Y, is in electrical contact with lthe frame B at the collar. The interruptor L completes the circuit from the primary coil through the frame i3 to the rolling,` electrode H, as the eontactspring K is the conductor from X to the wheel L. The spindle ofthe wheel has bearings at MX in the frame. In the construe tion oi' interrupter shown in Fig. Gthe Wheelspindle requires to be insulated in the frame, l'or the contact-spring is attached directly to the fra1ne,while the spindle connects with the terminal X. As arranged in Fig. l, the contact-spring is insulated at K' from the frame. l prefer the construction of interruptor represented in Figs. l and 3 on account of its greater simplicity. The part L of the Wheel is composed of alternate contact-points and breaks, as seen in the detail View, Fig. 3, and on either side of this surface a driving-snrl'aee, LX, of greater diameter to run against the periphery of the rolling electrode. rlhcse drivers maybe made of rubber. In the modification, Fig. (i, beveled drivers are employed, because the electrode from which the motion is taken revolves at right angle to the axis of the interruptcr to be driven. In either case the interruptor is operated from the rotation of the electrode H as the instrument is used. The terminal points or shunts of the second- ICO ary coil CZ are carried out through the insulating-block D in the end of the handle, as seen at W W W2, Ste., where they make contact With the spring R on the frame. The opposite terminal of the secondary coil is in electric connection with the cylindrical electrode T on the handle.

Different degrees of intensity in the current are obtained by carrying out terminals in this manner from successive layers of the secondary coil, the same as in my former instrument already patented; but instead ot` bringing out the ends of the Wires at the side of the handle I now place these terminal points in the end of the handle that sets through the socket of the frame. The contaetspring R is lixed in position to bear against one point at a time, and the contact-points W W', dsc., are so arranged that by turning the handle in the socket a greater or less distance any one of the points can be set to the contactspring. By setting the springd in this manner from one point to another a greater length of secondary coil can be brought into circuit to produce a stronger current. The intensity of the instrument is thus varied by simply turning the handle in the socket of the frame. By this construction I bring all the parts of the switch inside the frame and leave the handle smooth and Without projecting parts. There is no liability to shift the switch accidentally When using the instrument.

Having thus fully describedmy invention, what I claim, and desire to secure by Letters Patent, is

l. In an instrument of the character described, the combination ofthe ease or handle in which is mounted an induction-coil and a battery, and the frame B, adapted to carry a rolling electrode, and having a circuit-interrupter also mounted on it, the terminals of the induetioncoil being brought out at the end of the handle and suitably exposed to make electrical connection with the circuit-inter rupter and the electrode H, as hereinbefore described.

2. In an instrument of the character described,the combination, with the frame B,hav ing a rolling electrode mounted in it for rotation, as described, of the detachable handle containing an induction-coil and a battery and having the terminals ofthe same brought out to the end where the handle sets into the frame, substantially as described.

3. In an instrument of the character described, the circuit-interrupter consisting of the wheel L and the contact-spring K, in electrical connection with the frame B and the primary coil,and driving meehanism,substan tially as described, which connects the interrupter-Wheel with the rolling electrode to operate the same from the motion of the electrode, as set forth.

4. In an instrument ofthe character described, the combination of the handle or part carrying an induction-coil and a battery, and having a surface-electrode, and the frame or other part having a rolling electrode and a eircuit-interrupter mounted on it, the said parts being separable, substantially as described.

5. The combination ofthe rolling electrode in circuit, as described, and the circuit-interrupterhaving driving wheels or surfaces which are adapted to run against the rolling electrode to be driven by the rotation thereof, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand and seal.

JOHN S. MUIR. [1.. s]

Witnesses:

CEAS. E. KELLY, C. Vl". M. SMITH. 

